<template>
  <div>
    <div style="margin: 10px 0">
      <el-input style="width: 200px" placeholder="请输入名称" suffix-icon="el-icon-search" v-model="name"></el-input>
      <el-button class="ml-5" type="primary" @click="load">搜索</el-button>
      <el-button type="warning" @click="reset">重置</el-button>
    </div>
    <div style="margin: 10px 0">
<!--      <el-upload :action="'http://'+serveIp+':8083/file/upload'" :show-file-list="false" :on-success="handleFileUploadSuccess" style="display: inline-block">-->
<!--        -->
<!--        <el-button type="primary" class="ml-5">上传文件 <i class="el-icon-top"></i></el-button>-->
<!--      </el-upload>-->
      <el-button type="primary" @click="handleAdd" v-if="user.role!='ROLE_STUDENT'" >新增 <i class="el-icon-circle-plus-outline"></i></el-button>
      <el-popconfirm
          class="ml-5"
          confirm-button-text='确定'
          cancel-button-text='我再想想'
          icon="el-icon-info"
          icon-color="red"
          title="您确定批量删除这些数据吗？"
          @confirm="delBatch"
      >
        <el-button type="danger" slot="reference" v-if="user.role!='ROLE_STUDENT'">批量删除 <i class="el-icon-remove-outline"></i></el-button>
      </el-popconfirm>

    </div>
    <el-table :data="tableData" border stripe :header-cell-class-name="'headerBg'"  @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55"></el-table-column>
      <el-table-column prop="id" label="ID" width="80"></el-table-column>
      <el-table-column prop="name" label="课程名称"></el-table-column>
      <el-table-column prop="score" label="学分"></el-table-column>
      <el-table-column prop="times" label="上课时间"></el-table-column>
      <el-table-column label="是否开课">
        <template slot-scope="scope">
          <el-switch v-model="scope.row.state" active-color="#13ce66" inactive-color="#ccc" @change="changeEnable(scope.row)"></el-switch>
        </template>
      </el-table-column>
      <el-table-column prop="teacher" label="授课老师"></el-table-column>
      <el-table-column label="操作"  width="200" align="center">
        <template slot-scope="scope">
          <el-button type="success" @click="handleselect(scope.row.id)" v-if="user.role==='ROLE_STUDENT'">选课</el-button>
          <el-button type="success" @click="handleEdit(scope.row)" v-bind:flagsave="true" v-if="user.role!='ROLE_STUDENT'">编辑 <i class="el-icon-edit"></i></el-button>
          <el-popconfirm
              class="ml-5"
              confirm-button-text='确定'
              cancel-button-text='我再想想'
              icon="el-icon-info"
              icon-color="red"
              title="您确定删除吗？"
              @confirm="del(scope.row.id)"
          >
            <el-button type="danger" slot="reference" v-bind:flagsave="true" v-if="user.role!='ROLE_STUDENT'">删除 <i class="el-icon-remove-outline"></i></el-button>
          </el-popconfirm>
        </template>
      </el-table-column>


    </el-table>

    <div style="padding: 10px 0">
      <el-pagination
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
          :current-page="pageNum"
          :page-sizes="[2, 5, 10, 20]"
          :page-size="pageSize"
          layout="total, sizes, prev, pager, next, jumper"
          :total="total">
      </el-pagination>
    </div>

    <el-dialog title="课程信息" :visible.sync="dialogFormVisible" width="30%" >
      <el-form label-width="80px" size="small">
        <el-form-item label="用户名">
          <el-input v-model="form.name" autocomplete="off"></el-input>
        </el-form-item>
        <el-form-item label="学分">
          <el-input v-model="form.score" autocomplete="off"></el-input>
        </el-form-item>
        <el-form-item label="上课时间">
          <el-input v-model="form.times" autocomplete="off"></el-input>
        </el-form-item>
        <el-form-item label="老师"   >
            <el-select v-model="form.teacherId" placeholder="请选择">
              <el-option
                  v-for="item in teachers"
                  :key="item.name"
                  :label="item.nickname"
                  :value="item.id">
                {{item.nickname}}
              </el-option>
            </el-select>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogFormVisible = false" class="ml-5">取 消</el-button>
        <el-button type="primary" @click="save">确 定</el-button>
      </div>
    </el-dialog>

  </div>
</template>

<script>
import {serveIp} from '../../public/config.js'
export default {
  name: "File",
  props:{
    user:Object
  },
  data() {
    return {
      tableData: [],
      name: '',
      multipleSelection: [],
      pageNum: 1,
      pageSize: 10,
      total: 0,
      serveIp:serveIp,
      dialogFormVisible:false,
      form:{},
      flagsave:false,
      teachers:{}
    }
  },
  created() {
    this.load()
  },
  methods: {
    load() {
      this.request.get("/course/page", {
        params: {
          pageNum: this.pageNum,
          pageSize: this.pageSize,
          name: this.name,
        }
      }).then(res => {

        this.tableData = res.data.records
        this.total = res.data.total

      })

    },
    changeEnable(row) {
      this.request.post("/course/update", row).then(res => {
        if (res.code === '200') {
          this.$message.success("操作成功")
        }
      })
    },
    del(id) {
      this.request.delete("/course/" + id).then(res => {
        if (res.code === '200') {
          this.$message.success("删除成功")
          this.load()
        } else {
          this.$message.error("删除失败")
        }
      })
    },
    handleSelectionChange(val) {
      console.log(val)
      this.multipleSelection = val
    },
    delBatch() {
      let ids = this.multipleSelection.map(v => v.id)  // [{}, {}, {}] => [1,2,3]
      this.request.post("/course/del/batch", ids).then(res => {
        if (res.code === '200') {
          this.$message.success("批量删除成功")
          this.load()
        } else {
          this.$message.error("批量删除失败")
        }
      })
    },
    handleAdd(){
      this.dialogFormVisible=true
      this.form = {}
      this.flagsave=false
      this.request.get("/user/teachers").then(res=>{
        this.teachers=res.data
      })
    },
    handleEdit(row) {
      this.form = JSON.parse(JSON.stringify(row))  //可以解决编辑未确认就改变的问题
      // this.form=row
      this.dialogFormVisible = true
      this.flagsave=true
      this.request.get("/user/teachers").then(res=>{
        this.teachers=res.data
      })
    },
    save(){
      if(!this.flagsave){
        this.request.post("/course/inster",this.form).then(res=>{
          if(res.code=="200"){
            this.$message.success("添加成功")
            this.dialogFormVisible = false
            this.load()
          }else {
            this.$message.error("添加失败")
          }
        })
      } else {
        this.request.put("/course/", this.form).then(res => {
              if (res.data) {
                this.$message.success("修改成功")
                this.dialogFormVisible = false
                this.load()
              } else {
                this.$message.error("修改失败")
              }
    })
      }
    },
    reset() {
      this.name = ""
      this.load()
    },
    handleselect(courseId){
        this.request.post("/course/students/"+courseId+"/"+this.user.id).then(res=>{
          if(res.code==="200"){
            this.$message.success("选课成功")
          }else{
            this.$message.error("选课失败")
          }
        })
    },
    handleSizeChange(pageSize) {
      console.log(pageSize)
      this.pageSize = pageSize
      this.load()
    },
    handleCurrentChange(pageNum) {
      console.log(pageNum)
      this.pageNum = pageNum
      this.load()
    },
    handleFileUploadSuccess(res) {
      console.log(res)
      this.load()
    },
    download(url) {
      window.open(url)
    }
  }
}
</script>

<style scoped>

</style>
